Köprülü Mehmed Pasha was Grand Vizier of the Ottoman Empire and founding patriarch of the Köprülü political dynasty, a family of viziers, warriors, and statesmen who dominated the administration of the Ottoman Empire during the last half of the 17th century, an era known as the Köprülü era. He helped rebuild the power of the empire by rooting out corruption and reorganizing the Ottoman army. As he introduced these changes, Köprülü also expanded the borders of the empire, defeating the Cossacks, the Hungarians, and most impressively, the Venetians. Köprülü's effectiveness was matched by his reputation.

The Köprülü era was a period in which the Ottoman Empire's politics were frequently dominated by a series of grand viziers from the Köprülü family. The Köprülü era is sometimes more narrowly defined as the period from 1656 to 1683, as it was during those years that members of the family held the office of grand vizier uninterruptedly, while for the remainder of the period they occupied it only sporadically.